<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>

</head>
<body>
    <div id="box">
        <div id = "box-item">
            <div id="title">标题1</div>
            <div>标题1</div>
        </div>
        <div>
            <div>
                <h3>内容标题</h3>
                <p>1111111112222222222</p>
            </div>
            <div>
                <h3>内容标题</h3>
                <p>3333333333222222222</p>
            </div>
        </div>
    </div>
</body>
</html>